Տեղադրման կանոնը

Ա)

{x-2y=0           

{2x-3y-7=0

{x=2y

{4y-3y-7=0

Y=7

X-14=0

X=14

Բ)

{x+5y=0

{3x+7y-16=0

{x=-5y

{-15y+7y-16=-8y-16=0

Y=-16/8=-2

x+10=0

x=10

Գ)

{y-3x=0

{x-2y+10=0

{y=3x

{x-6x+10=-5x+10=5x-10=2

X=2

y-6=0

y=6

Դ)

{7x-y=0

{3x-y+12=0

{-y=-7x

{3x-7x+12=-4x+12=0

X=12/4=3

21-y=0

Y=21

Ա)

{x-y-1=0

{x+y-5=0

{x=y+1

{y+1+y-5=2y-4=0

Y=2

x-2-1=0

x=3

Բ)

{x-y-2=0

{x+y-6=0

{x=y+2

{y+2+y-6=2y-4=0

Y=2

x-2-2=0

x=4

Գ)

{x-y-2=0

{3x-2y-9=0

{x=y+2

{3y+6-2y-9=y-3=0

Y=3

x-3-2=0

x=5

Դ)

{x-2y-3=0

{5x+y-4=0

{x=2y+3

{10y+15+y-4=11y+11=0

Y=1

x-2-3=0

x=5

Ե)

{x+2y-11=0

{4x-5y+8=0

{x=11-2y

{44-8y-5y+8=52-13y=0

Y=52/13=4

X+8-11=0

X=3

Զ)

{x+4y-2=0

{3x+8y-2=0

{x=2-4y

{6-12y+8y-2=4-4y=0

Y=4/4=1

X+4-2=0

X=-2